Rotary engine



(No Model.)

0. P. COVERT as; 0. H. ZEIS.

ROTARY ENGINE.

Patented Sept. 2, 1884.

WITNESSES J? 6 W4,

N PETERS. whamm -0 m h. Washinglom 0.1:.

S A ES COMMODORE P. COVERT AND CHARLES H. ZETS, OF OROMERS, OHIO.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 304,298, datedSeptember 2, 1884.

Application filed March 27. 1834. (No model.)

To all whom it may concern.-

Be it known that we, COMMODORE P. CO- vnn'r and CHARLES H. ZEIs,citizens of the United States of America, residing at Gromers, in thecounty of Seneca and State of Ohio, have invented certain new and usefulImprovements in Rotary Engines; and we do hereby declarethe following tobe a full, clear, and exact description of the invention, such as willenable othersskilled in the art to which it appertains to make and usethe same, refer- .ence being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form. a part ofthis specification.

This invention relates to certain new and useful improvements in rotarysteamengines, its object being to provide an engine of this class withmeans fortaking up the wear at the side of the wheel, and with a valvewhich automatically regulates the admission of the steam from the chestto the cylinder-case; and to these ends it consists in the construct-ionand combination of the parts, as will be hereinafterset forth, andpointed out in the claims.

In the accompanying drawings, Figure 1 is a longitudinal sectional view,and Fig. 2 a transverse section.

' Arepresents the cylinder, which is mounted upon a suitable bed, and isprovided at one side of its periphery with an eduction-opening, whilethe induction-ports are located at the top of the cylinder, the upperportion at its exterior being fiat and provided with a transverse slot,a portion of which slot is cut away, so as to provide a wider openingnear.

the central portion. The sides of the cylinder are flanged and providedwith bolt-holes for the attachment ofthe cylinder-heads B B, which haveside extended portions which form shaftbearings. The rotary wheel D maybe integral with the shaft E, and is substantially cireular incross-section, and is recessed laterally for the reception of thepistons F. Near the ends of the slots or recesses (Z are providedcavities d for the reception of suitable springs, which bear upon theinner edge of the pistons and force the same against the inner peripheryof the case, thus forming a tight joint and taking up the wear. Theouter ends of the pistons are curved, as shown. Adjacent the recesses orslots in the wheel D are formed raised segments ff, which operate thecut-off valve G. The upper portion of the cylinder is provided at oneside of the center with passages a b, which unite with each other at theseat of the reciprocating valve, and terminate in a segmental opening,in which slides the curved valve G, which has formed therein two sl0ts,hh, which correspond in size with the steam-passages a b, and 011 theunder side of this segmental opening is a passage, 0, which connectswith the transverse slot formed in the upper part of the casing. Thecut-off valve H is operated by an eccentric, which is adjustable, so asto cut off at any desired point. This valve-operating mechanism isconnected with the shaft E, and, as the same forms no part of ourinvention, we will not describe nor illustratethe same. The valve Hoperates within the steam-chest, which is provided with aninduction-pipe. On theinner side of one or both of the cylinder-heads BB are placed circular plates B, and the heads are provided withset-screws,which bear against the same. These plates are for the purposeof taking up the lateral wear of the wheel and pistons, and can beadjusted from the exterior by turning the setscrews.

' The operation of our engine is as follows:

WVhen steam is admitted into the steam-chest and the valve G restingupon the wheel D, as shown in Fig. 2, it will pass throughthe openings ab and the curved valve G and slot 0, so as to exert a pressure upon thepiston and thus cause a partial rotation of the wheel D. When the pistonhas about reached the eduction-opening, this valve Gis raised bythesegmentf, which cuts ofi the steam from the cylinder, and at the sametime the steam is out off by the slidewvalve H and is not let on untilthe curved valve G is raised. The slide- Valve H is for the purpose ofregulating the amount of steam and to thus regulate the speed of theengine, and, being provided with suitable shifting-gear, may be employedto start and stop the engine. It will be seen that the valve G operatesentirely by gravity, and, as the slide-valve has two openings, itoperates three times to let on and cutoff steam at each 100 revolutionof the engine. What we claim is 1. In a rotary engine, a reciprocatingslidevalve having two direct openings and passages, forming a steamwayto a curved valve, which is operated by gravity in one direction and bythe wheel in another direction, substantially as shown.

2. The combination, in a rotary en gine,with

a wheel provided with pistons and raised segments, of the curved valveH, having-ports which open and close passages from the steamchest,substantially as shown.

3. In a-rotary engine, the casing provided with a steam-chest, having areciprocating valve, G, steam-passages a b c, the valve H,

withports corresponding with the passages a r 5 and b, wheel D, havingraised segments ff, and pistons F, and an eduction-opening, the partsbeing combined and organized substantially as shown and for the purposeset forth. In testimony whereof we aflix our signatures in presence oftwo witnesses.

COMMODORE I, COVERT. CHARLES H. ZEIS.

Witnesses:

JNo. F. SHAULT, GEO. T, ZEIS.

